Nutmeg CO2 Extract vs Essential Oil: Four Products
A bottle labelled "nutmeg" can hold at least four different materials: a steam-distilled essential oil, a supercritical CO2 extract, a solvent oleoresin, or a pressed or CO2-fractionated butter. They share a botanical name and little else. The practical rule is to read the process word on the label, or ask for it, before you compare anything else, because every figure below changes with it. We sell nutmeg essential oils only, not extracts or butter, and this post exists so that you can tell what you are being offered elsewhere.
Nutmeg Essential Oil
Our own Nutmeg Essential Oil, in sizes from 0.5 oz to bulk.
From $10.99
Shop Now →Start from the regulator's vocabulary
The US list of flavouring substances in 21 CFR 182.20 is headed "Essential oils, oleoresins (solvent-free), and natural extractives (including distillates)", and gives nutmeg and mace their own entries (21 CFR 182.20). The heading shows that the law already treats an oil, a solvent-free oleoresin and a natural extractive as separate classes. It is a food-flavouring provision and says nothing about skin or aroma use, so it does not tell you which class suits a candle or a body oil.
The four products, as the sources describe them
| Product | Made by | What a source reports |
|---|---|---|
| Essential oil | Steam distillation of dried, crushed seeds; water separated by decantation (EFSA, 2023) | Seven Indonesian batches: sabinene 14% to 29%, alpha-pinene 15% to 28%, beta-pinene 13% to 18%, myristicin 5% to 12% (specification); safrole 1.69% to 2.30% |
| CO2 volatile fraction | Supercritical CO2 at 40 C and 90 bar (Piras et al., 2012) | Myristicin 32.8%, sabinene 16.1%, alpha-pinene 9.8%, beta-pinene 9.4%, safrole 4.1%; 1.4% of the charge by weight |
| CO2 butter-like fraction | Same extraction, next step at 250 bar | 14.4% of the charge; fatty acids 14:0 (myristic) 79.2%, 18:1 n-9 7.4%, 16:0 6.1% |
| Oleoresin and fixed oil | Extraction details not given in the abstract read | Kerala kernels: oleoresin 18.59% to 36.20%, fixed oil 17.79% to 44.80% (Vikram et al., 2024) |
Sources: EFSA FEEDAP Panel, 2023; Piras et al., 2012; Vikram et al., 2024. The EFSA specification rests on ISO 3215:1998, whose AFNOR listing is titled "Oil of nutmeg, Indonesian type (Myristica fragrans Houtt.)" and says the standard "specifies certain characteristics of the oil of nutmeg" to facilitate assessment of its quality (ISO 3215:1998, AFNOR listing). The full text is paid and was not read, and none of the sources read set a comparable specification for a CO2 extract.
What the myristicin gap does and does not prove
Piras and colleagues' first CO2 fraction held 32.8% myristicin. EFSA's specification for steam-distilled seed oil tops out at 12%, so the CO2 fraction is 2.7 to 6.6 times the specified range. It is tempting to conclude that CO2 concentrates myristicin. That is a reasonable hypothesis, but the two numbers come from different seed lots whose origins were not compared here, and the Kerala study shows how far myristicin moves between kernels alone: 2.98% to 12.84% in kernel oil from 17 types of one state (Vikram et al., 2024). One paper cannot separate method from material. What it does show is that a CO2 fraction is a different composition from the distilled oil, and that the distilled oil's published specification cannot be borrowed for it.
Yield comparisons are just as slippery. A review table lists kernel hydrodistillation at 6.2% and 7.6% and CO2 supercritical extraction at 5.9% (Ashokkumar et al., 2022), each from a different study; Piras's 1.4% is only the first fractionation step. Treat yield as a property of a particular run, not of a method.
Safety rules written for the oil also reach the extract
The IFRA Standards (51st Amendment) name neither nutmeg oil nor any nutmeg extract, so no standard sets a figure for either by name (IFRA, 2024). They do cap a constituent: natural extracts are tolerated only while safrole, isosafrole and dihydrosafrole total no more than 0.01% of the finished product. Dividing 0.01 by the safrole share gives the largest amount of material that stays under that line. This is arithmetic on one paper's fraction, not a limit for any product on sale:
- Distilled oil, safrole 1.69% to 2.30% (EFSA batches): 0.59% down to 0.43% of the finished product.
- CO2 volatile fraction, safrole 4.1% (Piras): 0.24%.
So on that one constituent the extract would have a lower allowance than the oil. The same standards body's methyl eugenol Standard is also written by constituent, which is why a material's own GC-MS report matters more than its category name. The Tisserand Institute's nutmeg chart, which gives adults 0.8% for East Indian and 5% for West Indian oil, is headed "Nutmeg essential oil"; the search found no published dermal figure for CO2 extract, oleoresin or butter (Tisserand Institute, 2019). Without one, the sensible default is to ask the supplier for the lot's data and, if it is thin, to stay well under the oil's figures. Our own copy for our oils says 0.5% to 2% in a carrier with a patch test first; against the 0.8% chart figure and the safrole arithmetic above, we recommend 0.5% as the ceiling for leave-on use of an oil. A pressed butter is a different matter again: none of the sources read described one, so this post does not describe its composition.
The buyer's checklist
- Ask for the botanical name, the part used (kernel, aril or whole seed) and the process in words: steam distillation, hydrodistillation, supercritical CO2, solvent extraction or pressing.
- Ask for a GC-MS report for the lot with myristicin, safrole, elemicin and methyl eugenol shares. A certificate that lists only density, refractive index and optical rotation does not give constituents; the one we publish for batch NUTLUBMFINC006A has those three values (0.887, 1.478, +11.80) and no constituent percentages.
- Do not reuse a recipe's ratio across product types. A drop count written for a distilled oil says nothing about a CO2 fraction.
- Ask what the supplier intends the material for. A material made for flavour use is not automatically suited to a skin or candle formula; that is inference, and the supplier's documents are the check.
Our shop copy describes our nutmeg oils as distilled. If the method matters for your formula, ask in writing before ordering and keep the answer in writing, and for any extract or butter look to a supplier that sells it. Related reading: reading a nutmeg oil label, what nutmeg oil is, essential oil versus fragrance oil, nutmeg versus mace oil and substitutes.
When you want the essential oil rather than an extract, both our Botanical and Purity oils are sold neat, so the dilution maths is yours.
Nutmeg Essential Oil
Nutmeg Essential Oil from our own shop, in sizes from 0.5 oz to bulk.
From $10.99
Shop Now →Sources & Further Reading
- EFSA FEEDAP Panel, 2023. Safety and efficacy of nutmeg oil as a feed additive, EFSA Journal 21(6):8066. PMC10273060
- Piras A et al., 2012. Extraction and separation of volatile and fixed oils from seeds of Myristica fragrans by supercritical CO2, J Food Sci. europepmc.org/MED/22429024
- Vikram HC et al., 2024. Chemical profiling and constituent diversity in nutmeg genotypes. arccjournals.com/a-5848
- Ashokkumar K et al., 2022. Nutmeg essential oil: a review on its composition, biological and pharmacological activities, Phytother Res 36(7):2839-2851. PMC9541156
- ISO 3215:1998. Oil of nutmeg, Indonesian type, catalogue listing. boutique.afnor.org
- US eCFR, 21 CFR 182.20. law.cornell.edu/cfr/21/182.20
- IFRA, 2024. IFRA Standards, 51st Amendment compilation. ifrafragrance.org
- Tisserand Institute, 2019. Assessing the safety of essential oils, the nutmeg case (chart). tisserandinstitute.org